text: function show_date_time() {
  	window.setTimeout("show_date_time()", 1000);
  	var BirthDay = new Date("04/02/2020 00:00:01");
  	var today = new Date();
  	var timeold = (today.getTime() - BirthDay.getTime());
  	var sectimeold = timeold / 1000;
  	var secondsold = Math.floor(sectimeold);
  	var msPerDay = 24 * 60 * 60 * 1000;
  	var e_daysold = timeold / msPerDay;
  	var daysold = Math.floor(e_daysold);
  	var e_hrsold = (e_daysold - daysold) * 24;
  	var hrsold = Math.floor(e_hrsold);
  	var e_minsold = (e_hrsold - hrsold) * 60;
  	var minsold = Math.floor((e_hrsold - hrsold) * 60);
  	var seconds = Math.floor((e_minsold - minsold) * 60);
  	document.getElementById 
  	("show_date_time").innerHTML="本站已愉快蹦哒"+daysold + "天" + hrsold + "小时" + minsold + "分" + seconds + "秒";
  }
  show_date_time()